Start the tour with an early pick up from your hotel in Puerto Princesa City. Enjoy a 2.5-hour drive to Sabang during which you can admire the picturesque scenery. From Sabang, take a small motorized Bangka boat to the entrance beach. Pass through a wonderful forest area home to a number of indigenous species including a naughty troop of macaques. Get up close to monkeys and monitor lizards in a rainforest setting. From there, enter the underground river on a paddle boat during a 45-minute to 1-hour tour. Explore the pitch-dark inner recesses of the cavern as you navigate one of the longest underground rivers in the world with a total length of 5 miles (8 km). Witness the stalagmite-pillared interiors, different rock formations, and domed amphitheaters which took thousands of years to form. Marvel at the swift and bat populations that inhabit the cave. Upon your return to the Sabang port, visit a local restaurant for a buffet lunch.